CISCO2921/K9, Cisco 2921 Router, 3 GE/4 EHWIC slots/512MB DRAM

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Absolutely. As a multi-brand authorized distributor, router-switch.com is directly certified by leading technology manufacturers. We guarantee 100% genuine products, competitive pricing, and full manufacturer warranties and support.

Can the CISCO2921/K9 router be used for VoIP applications?

Yes, with the inclusion of DSP slots and the appropriate voice modules, the CISCO2921/K9 supports VoIP for business communication needs.

How does the CISCO2921/K9 router compare with other Cisco ISR 2900 series routers?

The CISCO2921/K9 has moderate capacity and flexibility within the ISR 2900 series, offering a balance of cost and performance compared to higher-end models like the CISCO2951/K9.

What accessories are available for the CISCO2921/K9 router?

Accessories include additional EHWIC cards, DSP modules, service modules, power supplies, and rack-mount kits.

What are common troubleshooting steps for the CISCO2921/K9 router?

Common steps include checking power and network cables, verifying configuration settings, and reviewing system logs via the CLI for error messages.

Are there alternative products to the CISCO2921/K9 router?

Alternatives include the Cisco ISR 2900 series, such as the CISCO2951/K9, which offers higher performance and more advanced features.

Does the CISCO2921/K9 router need regular upgrades?

Regular firmware and software updates are recommended for the CISCO2921/K9 to maintain security and performance. Check Cisco's website for updates.

How do you install the CISCO2921/K9 router?

Installation involves mounting the router in a rack, connecting the necessary cables, powering on, and configuring via the command-line interface or web-based management.

What application scenarios are ideal for the CISCO2921/K9 router?

The CISCO2921/K9 is suitable for branch offices, small to medium-sized businesses, and integrative network environments requiring robust and scalable solutions.

What are the main characteristics of the CISCO2921/K9 router?

The CISCO2921/K9 features 3 GE ports, 4 EHWIC slots, 3 DSP slots, 1 service module, 256MB compact flash, and 512MB DRAM, ideal for varied networking needs.

How cost-effective is the CISCO2921/K9 router for system integrators?

The CISCO2921/K9 offers high performance and flexibility with 3 GE, 4 EHWIC, and 3 DSP interfaces, making it a cost-effective choice for integrators needing scalable solutions.

Are there any alternative products to the CISCO2921/K9 that offer similar features?

The CISCO2951/K9 is a viable alternative, offering similar features with additional throughput and performance capabilities for growing network demands.

How can I ensure the CISCO2921/K9 is running the latest software?

Regularly check Cisco's official website for software updates or enable automatic updates in the device configuration to ensure your CISCO2921/K9 is running the latest firmware and software for optimal performance.

What is the function of the EHWIC slots in the CISCO2921/K9?

The Enhanced High-Speed WAN Interface Card (EHWIC) slots in the CISCO2921/K9 support various modules including WAN, voice, and network services expansion for tailored network solutions.

Can the CISCO2921/K9 router support Gigabit Ethernet?

Yes, the CISCO2921/K9 router comes equipped with 3 Gigabit Ethernet ports suitable for high-speed connectivity needs.

Is the CISCO2921/K9 suitable for small to medium-sized enterprises (SME)?

Absolutely, with scalable performance and security features, the CISCO2921/K9 is ideal for SMEs needing reliable internet and intranet connectivity.

How does the CISCO2921/K9 handle network redundancy and failover?

The CISCO2921/K9 can be configured with High Availability protocols such as HSRP, VRRP, or GLBP to ensure continued network service in case of a device or path failure.

What are the security features of the CISCO2921/K9?

The CISCO2921/K9 supports a wide range of security features including firewall, intrusion prevention, VPN, and Secure Sockets Layer (SSL) encryption to ensure secure data transmission.

Is the memory of the CISCO2921/K9 upgradeable?

Yes, the CISCO2921/K9 router supports memory upgrades. It comes with 512MB DRAM, which can be increased to enhance performance.

Can the CISCO2921/K9 support Voice over IP (VoIP) services?

Yes, with the appropriate DSP (Digital Signal Processor) modules installed, the CISCO2921/K9 can support VoIP services efficiently.

What rack-mount options are available for the CISCO2921/K9?

The CISCO2921/K9 comes with standard 19-inch rack-mount brackets, compatible with most server racks.

Does this router Cisco 2921/K9 come with LAN port modules?

NO, as for 2921 it comes with no LAN port. But for routers more advanced than Cisco2901 support SM slots, you can chose SM, like SM-ES3G-16-P, support Layer2/3 ports can you use them as LAN ports.

Are these2921/k9, 3945/k9 have the same IOS?

NO, they have the different part number but their features are similar.

I've got a 2921 used to connect to physical sites over a WAN connection (BT Fibre). I was wondering if someone can tell me (or point me to) what speeds the 2921 can support in terms of throughput. We do dynamic routing but we don't so any encryption or NAT.

www.cisco.com/web/partners/downloads/765/tools/quickreference/routerperformance.pdf It says 2921 can support 245.76 mbps

I purchased brand new router from Cisco 2921 also I purchased an SFP-Transceiver (GLC-SX MM) along with this Router. However the Router does not Supporting SFP Transceiver. Currently the Router is having Universal IOS: “c2900-universalk9-mz.SP151-3.T1.bin”. Kindly provide the IOS i woud like to use. Is the same is IOS compatibility, thanks.

MAJOR untested bug in IOS 15.0(1) M3 which was the default image when we bought the devices *** AVOID IOS 15.0 series *** There are several bugs related to SFPs like: Does does recognize SFP does not recognize some EHWIC cards such as, but not limited to EHWIC 1GE-SFP-CU.

What is the exact HSEC-k9 license?

The HSEC-K9 license removes the curtailment enforced by the U.S. government export restrictions on the encrypted tunnel count and encrypted throughput. HSEC-K9 is available only on the Cisco 2921, Cisco 2951, Cisco 3925, Cisco 3945, Cisco 3925E, and Cisco 3945E. With the HSEC-K9 license, the ISRG2 router can go over the curtailment limit of 225 tunnels maximum for IP Security (IPsec) and encrypted throughput of 85-Mbps unidirectional traffic in or out of the ISR G2 router, with a bidirectional total of 170 Mbps. The Cisco 1941, 2901, and 2911 already have maximum encryption capacities within export limits.

What countries are classified license-free zones?

Countries belonging to the EU license-free zone include Australia, Austria, Belgium, Bulgaria, Canada, Cypress, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Japan, Latvia, Lithuania, Luxembourg, Malta, Netherlands, New Zealand, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey, United Kingdom, and the United States.

We know the ISR2 series included VPN hardware acceleration but there is a "HSEC" which included an "advanced" encryption card. We are just trying to get my head around it. Is the HSEC bundle really needed over the standard SEC bundle? Now we need to support a 50meg Internet connection with 4 Site-to-Site VPNs and use of the firewall, NAT and QOS on each router. We are looking at the Cisco2921-SEC/K9 bundle. Does this sound about right?

If your internet link is 50mb, then a 2921 (non-HSEC) can handle the encryption/decryption. The standard SEC license comes with a software-based rate limiter of 85 Mbps each way. If the protocol does not handle loss/retransmissions very well, throughput can easily plummet. Testing in a lab environment with two Cisco 2921s, I saw speeds drop to 25 Mbps. Also info on the HSEC license can be found here in regards to what it is and what t does for you. It allows for addition through for encrypted traffic NASA higher number of VPN tunnels. https://www.cisco.com/en/US/prod/collateral/routers/ps10536/qa_c67_606268.pdf

We have installed a 60 day license for the security k9. The Cisco 2900 router we got. And we are trying to set up a client to site vpn on this and it still does not recognize the ipsec and isakmp commands. Is there a command I need to do to now enable ipsec and isakmp?

Make sure your Cisco 2900 took the license, issue 'show license' and verify. Show license shows that it is in there and active. I rebooted and it still throws an error whenever i issue crypto ipsec or crypto isakmp Here is your problem: from "show license" License State: Active, Not in Use, EULA accepted "not in use" is the key. Try using "license modify priority securityk9 high" or the config command "license boot module c2900 tech securityk9" to make this feature in use, rather than not in use.

 Are there any restrictions with the memory modules for the new platforms?

The Cisco Series Integrated Services Routers ship with higher default memory (both DRAM and Compact Flash) than today's integrated services routers. The Cisco 2951, 3925, 3925E, 3945, and 3945E routers have two modular dual-inline-memory-module (DIMM) slots for error-correcting code (ECC) double-data-rate 2 (DDR2) synchronous dynamic random access memory (SDRAM)-each slot capable of integrating 512 MB to 2 GB DIMM.

Which AC option should I choose? Does it support AC + PoE option? and which should I choose?

PWR-2921-51-AC is the right AC option. And it supports AC + PoE option, PWR-2921-51-POE is the one you should choose.